Home / 21,179.75-31,819.27-19,982.88

Finding the Fourth Proportional to 21,179.75, 31,819.27 and 19,982.88

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Solution

The fourth proportional to 21,179.75, 31,819.27 and 19,982.88 is: 30,021.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.75 : 31,819.27 = 19,982.88 : x
  2. Step 2: Convert to fraction form
    21,179.75/31,819.27 = 19,982.88/x
  3. Step 3: Cross multiply
    21,179.75x = 31,819.27 × 19,982.88
  4. Step 4: Simplify right side
    21,179.75x = 635,840,554.18
  5. Step 5: Solve for x
    x = 635,840,554.18/21,179.75
  6. Step 6: Final answer
    x = 30,021.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.